office. >> they are practicing being pointed but being respectful. >> and mitt romney's looking to breathe new life into his campaign, as polls show him trailing in some key swing states. >> romney has to do something in the debate to get an edge over obama or he's not going to win. >> it will be a big stage. in 2008, more than 50 million people tuned in for the first obama-mccain face-off of that presidential year. keeping a close eye on the candidates -- fact checkers. >> somebody once said that what we should do in a debate is be off stage and if a candidate lies, i should come on stage and slap them across the face. unfortunately, it's not that immediate. >> it takes a little longer, which is why a full staff will work throughout the night to see who is telling the truth and who's not. >> many folks will not listen to 90 minutes of this debate, but they will listen to three or four sound bites that are the best.